Industrial Engineering and Production Management
Pessimistic time is

The minimum time in which an activity can possibly be accomplished
The maximum time which an activity might require
The average time required for a job
The most probable time considering all conditions

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Industrial Engineering and Production Management
Work study is mainly aimed at

Developing the standard method and standard time of a job
Determining the most efficient method of performing a job
Economizing the motions involved on the part of the worker while performing a job
Establishing the minimum time of completion of a job

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